the Apollo Conbraco 4A-4A3-3AM is a 1/2" FNPT dual check backflow preventer engineered for reliable protection in residential and commercial water supply lines

Simplified Installation: The threaded NPT connections and compact direct-coupled design eliminate the need for specialized linkages or complex mounting

Constructed from durable materials to resist corrosion in high-heat environments

It is essential to cross-reference your unit's serial number and valve code against the manufacturer’s technical tables to ensure the spring tension and orifice diameters match your BTU rating

Key Benefits for the Contractor High Torque Output: Delivers 180 lb-in for managing large-scale valve assemblies and high-static dampers

Conbraco 18C-511-5-150 Valve Freon the Apollo Conbraco 4A-4A3-3AM isThe Conbraco 18C 511 5 150 is a high capacity Temperature and Pressure Relief Valve designed for heavy duty commercial and industrial water heaters. Engineered with a 3 4" Male NPT inlet and a 3 4" Female NPT outlet, this T&P relief valve is set to trigger at 150 PSI and 210F. With a massive 1,912,000 BTU hr capacity, it ensures reliable thermal expansion protection and vacuum relief in high demand systems. The 5" probe length provides precise